diff --git a/lib/socket.js b/lib/socket.js
index d3bda375..eccf049c 100644
--- a/lib/socket.js
+++ b/lib/socket.js
@@ -52,7 +52,7 @@
         (!this.isXDomain() || io.util.ua.hasCORS)) {
       var self = this;
 
-      io.util.on(global, 'beforeunload', function () {
+      io.util.on(global, 'unload', function () {
         self.disconnectSync();
       }, false);
     }